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This is a place to share knowledge related to 1/12th scale racing. It is not to be used for conversations.

KITS:
Click links to go to manufacturer product page. If any are missing please add them!

TIRES:
Pre-mounted tires readily available in the US:
Pre-mounted tires readily available in the Europe:
  • Hot Race ??

Gluing your own donuts:
https://www.youtube.com/watch?v=hm7z1rz-74s - Special thanks to Edward Pickering!
Truing tires:
https://www.youtube.com/watch?v=8wqHOLWq6Uc - Special thanks to Edward Pickering!

The following information came from HERE, with some editing and information added. Thanks Christian!

THIS MAY NEED UPDATING FOR THE NEW BLACK CRC CARPET

Brands:
BSR, CRC, Jaco:
Pro One is no longer selling to the public, but it and the brands above are all mounted by BSR and use the same foam. The nomenclature of the BSR vs Jaco/CRC is a little different in a few instances but is otherwise the same. The BSR foam consists of three families, and can be identifed as synthetics, naturals, and blends.

Synthetics - The old school, light weight, easy to true "dry feeling" tires. These include tires like CRC/Jaco Yellow (BSR White), Black, Gray, etc. These tires offer the highest wear rate and lowest grip. Many racers continue to use these nder high bite conditions.

Naturals - These tires are usually the best alternative for low bite and asphalt. They include Pink, Magenta, Double Pink, Lilac (BSR Team Purple), Purple, and other tires. These tires provide a ton of grip, but tend to get sticky in high bite conditions. This rubber does not wear as easily, and the cars will pick up gunk and fibers from the carpet under most high bite conditions. This is especially bad if the humidity is high.

Blends - These are the tires most people run today. They were initially called "JFT foam" by some, as it was believed that the tires were the same as the JFT tires. We can divide the blends further into two groups: high rubber and low rubber content. The high rubber would be the new rear Orange and Red from the BSR family, and the low rubber would be the Green and Blue varieties. When, asked about the difference, John Foister from BSR Tires said they came from the same "family" of foam, but they offered different grip. According to John, the Green/Blue has more bite than Orange/Red, but from track testing Oranges offer more bite than Green (being equivalent to in hardness) when the grip is high and absolutely no grip when it is lower. The Orange foam has a denser pore structure and the tire is not as prone to chunking. It is also important to note is that BSR Blue rears are not the same as the BSR Blue fronts!

JFT:
JFT stands for Japan Foam Tire. They started the new wave of foam tires we are all using now (Blue/Blu, Green/Greene, Dbl Blue, etc). These tires are a little different than the BSR tire family, but work in very similar conditions. They offers four varieties A (asphalt), C (carpet), S (???), and R (???). This does not mean that those types only work on that surface, but this is what they recommend.

JFT uses the same foam for fronts and rears if the color is the same.

A: Used on asphalt, considered close to the natural rubber variety and are named consistently with other natural tires.
C: Used on carpet, considered a blend.
S: Used on carpet?, tires are ???
R: Used on carpet?, tires are ???

For setup, the JFT foam seem to generate more bite than the BSR, therefore the car tends to be a little more aggressive.

Ulti:
Ulti is another Japanese brand that offers an array of compounds. They have their own way of rating tires, and are difficult to equate to other brands. They have 4 different varieties, each in varying degrees of hardness.

J: High rubber content tire, similar to Pink/ Magenta. Soft would be close to a pink. These offer the most bite and are great for asphalt/carpet front tire. (J hard being very popular)
X: "Balanced" blend, similar to JFT Blue/ Green. Soft is equivalent to Green, medium to Blue in hardness. Great for carpet!
Y: High synthetic blend with lower grip, and is not a very popular variety.
Z: A very expensive "special" foam that is supposed to be magic on asphalt. Only make it in soft shore.
European tires:
There are many great European foam tire brands that use their own types of foam, as well as traditional foams. SOmeone with more knowledge about them will need to fill this in!

Tire Diameter:
If you are racing on carpet, you have to evaluate how much grip your track has. If your track is low to medium grip, you can run bigger tires. If you are on higher bite you have to cut them smaller, there is simply no way around it. Bigger tires are needed for asphalt, especially in the rear. The larger tires provide much needed lateral bite.

Carpet (mm):
Low - Medium Bite
Front: 42.0 - 42.5
Rear: 42.5 - 43.00
Medium - High Bite
Front: 40.5 - 41.0
Rear: 41.5 - 42.0
Big Race
Front: 39.5 - 40.0
Rear: 40.5 - 41.0
Asphalt (mm):
Parking Lot
Front: 43.0 - 44.0
Rear: 44.0 - 45.0
Prepped High Bite
Front: 42.0 - 43.0
Rear: 43.0 - 44.0

Tire Saucing:
Most facilities have moved towards odorless traction additives such as SXT. Some of additives evaporate very quickly and some do not. This seems to be something that is also dependent on tire compound and ambient temperature. For example, saucing a Green compound seems like it never dries, especially when tjhe temperature is lower. We have found that wiping the tires off 15 minutes before we go run allows the sauce to cure, which makes the car come in much quicker with Green rears. Blue compounds on the other hand, do fine when wiped off right before hitting the track.

Saucing half front and full rear is a good initial starting point. If the front of the car is too agressive you can sauce les than half, or for a shorter amount of time.
Tire Fuzzing:
In conditions of increasing grip, foam tires will somewtimes get sticky and pick up fuzz and debris from the track. This is highly dependent on the rubber sedan tire that is being run at your local track and the compound/ type of foam you are running on you car. The softer the sedan tire and the harder/higher rubber content in your foam tire, trouble with fuzzing seems more likely to occur.

There are ways to get around fuzzing under most conditions, and usually involves the selection of the correct foam compound. The more fuzz you get, the softer/lower rubber content you want to run.

Examples:
Problem: Car fuzzes with Lilac/Team Purple fronts and car starts pushing.
Solution: Use a softer front tire and or different family of foam. Replace it with Blue or Double Blue front.

Problem: Car loses rear bite 6 minutes into the run. Blue rear tires look almost clean but have small carpet hairs.
Solution: Use Green rear tires. The softer compound wears instead of getting sticky, minimizing fuzz.

Tire Selection:
Starting out, pick 2 tire compounds for the front and rear. The following should have you covered 99% of the time.

Front - Green and Blue (BSR) or Green and Light Blue (JFT)
Rear - Blue and Double Blue (BSR) or Blue and Dark Blue (JFT)

You may wonder about other compounds out there and if they might be better, trust me, they probably won't be. Even if there are other tires that can be as fast, the synthetic family wears out really fast and the high natural rubber will probably fuzz on you over an 8 minute run. The blends family seems to be the most versatile foam type available today. They last awhile, and sticking to them will make your process of tire selection simpler.
Tire Charts:
BSR/CRC/Jaco



Contact



Corally



JFT (Japan Foam Tire)



Ulti



Enneti (Xceed)



ELECTRONICS:
ESC:
As of now, ROAR is staying 1S (3.7V nominal; 4.2V fully charged) for 1/12. There are many 1S ESC's with a built in BEC so nothing else is required to power the receiver and servo.

If you don't want to lock yourself into a 1S specific ESC, you do have other options! It is possible to use your 2S ESC without a booster or receiver pack, and the ESC simply supplies the lower voltage. If that does not appeal to you, you will need to use an Rx pack or booster. The Rx pack and booster will both supply the receiver with a higher voltage than the 1S pack.

If you decide to use an Rx pack, MAKE SURE TO REMOVE THE RED WIRE FROM THE ESC PLUG THAT GOES INTO THE RECEIVER!!!

If you choose to use a voltage booster, it works exactly how it sounds. Instead of plugging the ESC into the receiver, it plugs into the booster, and the booster plug goes to the ESC, supplying the higher voltage.

1S ESC:
If there are any missing please add them!!

If anyone would like a need for a chart comparing the ESC's specs PM fenton06 and I'll get one made and put in here!
Voltage Boosters:
If there are any missing please add them!
Servos:
BODIES:
Black Art (CRC - US Dist):
  • Audi R8C - BA002 - .020 Thick



  • Black Market (Mohawk 12) - BA005 - .020



  • Lola B10 - BA006 - .020 thick
  • Toyota TS030 - BA008 - .020 thick

    Lola - black/red, TS030 - green/pink


PROTOForm:

Reflex Racing/RSD:

SUSPENSION ADJUSTMENTS:

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Old 04-11-2007, 04:55 PM   #24826
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this is a pic of the prototype.i will take more pics of the production version tommorow.
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1/12 forum-link-12-car.jpg  
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Old 04-11-2007, 05:00 PM   #24827
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Quote:
Originally Posted by InspGadgt
I love my Darkside but I am really fascinated by your design as well. I think you and Darkside hit on something really important in setup of a link style car and that is how far outboard the springs are. Darkside has 3 positions for mounting the roll springs...yours has the low maintenance and probably more progressive rate of fiberglass. I'd love to see a cross between the 2 cars using the in-line battery of the Darkside and the fiberglass side links of your car.

i wish i had alot more time to do this stuff.im really limited on the time i get to spend on developement of the car stuff but i try to get as much done as possible.the darkside car is a very interesting car and maybe one day him and i can fart around with some sort of mix car.thanks for the props buddy.
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Old 04-11-2007, 05:02 PM   #24828
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I just like 1/12th scales and as a result have bought several even though the one(s) I'm running is working well. I do plan to pick up one of your cars too when I can get the money together...maybe in my next bonus check.
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Old 04-11-2007, 05:08 PM   #24829
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I got to see Schreff's BMI 1/12th a couple of weeks ago. It is awesome looking car. Great job Jason. I love my Darkside car. But i will buy one of yours before carpet season and see what it is all about. The Darkside car keeps up so much corner speed.
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Old 04-11-2007, 05:10 PM   #24830
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thats cool buddy.i really appreciate it.i have been really taking to the 1/12th scale racing over my touring cars.i always like trying out other cars and working with them.it may be bad business on my part running other brand cars sometimes but hell,its a hobby for me too. i really like my own cars but it doesnt mean i cant appreciate other companies cars also.since i have completed my new car i havent run anything else because i am still working with it and always trying to get it better.so far it is going better than i could have hoped for.the car has been insane fast and handling like a dream.i really nailed it last time out.
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Old 04-11-2007, 05:12 PM   #24831
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Quote:
Originally Posted by SRW141
I got to see Schreff's BMI 1/12th a couple of weeks ago. It is awesome looking car. Great job Jason. I love my Darkside car. But i will buy one of yours before carpet season and see what it is all about. The Darkside car keeps up so much corner speed.
thanks buddy.we should have the car really pegged on carpet for next season.we got it out on the rug a little too late this year and didnt have time to prepare.this year will be different.
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Old 04-11-2007, 05:18 PM   #24832
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Quote:
Originally Posted by protc3
thanks buddy.we should have the car really pegged on carpet for next season.we got it out on the rug a little too late this year and didnt have time to prepare.this year will be different.
I tought about getting one now. Since I'm getting the Mi3 soon can't afford two new cars. We race 1/12th scale at our indoor asphalt track in Frederick, MD all year round.
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Old 04-11-2007, 05:52 PM   #24833
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i wish we had indoor asphalt.florida this time of year starts to get pretty warm.by the summer time you have to have keg hats full of water so you dont dehydrate. summer racing is fun but the heat sucks.track temps exceeding 175 degrees arent cool either.
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Old 04-11-2007, 06:05 PM   #24834
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im gonna get a Mi3 also.i got to try out Pdubs car and was really impressed with it.i may need to shelf the cyclone for a bit while i run the Mi3.cant wait till they get here
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Old 04-11-2007, 07:59 PM   #24835
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not electric but it is a 12th scale pan car:

http://www.redrc.net/2007/04/kyosho-...112th-pan-car/
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Old 04-11-2007, 08:03 PM   #24836
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Quote:
Originally Posted by Marcos.J
420?? the 07 M5 is 5.0 Liter, DOHC, V10 500-HP.
yeah, but look how much an m5 wight and then look at the new m3. carbon fiber roof and alum hood. also the lightest v8 on the market. I had an 07 m5 just too big for a track car. turned it back in
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Old 04-11-2007, 08:54 PM   #24837
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Like many others who post on this thread, I'll try most every 1/12th scale car that comes out just to see what it's about and cause it's so much fun to build and to tinker with something new and different. For years I've always found my trusty tbar to be the most reliable and consistant car from run to run and week to week. Most any of the car's i've experimented with have been capable of running compedative lap times on occasion. And there's been alot of experimentation in my stable. To name a few...Slapmaster, 12L4, speedmerchant, carpet knife, darkside, corally (both old and new versions), PRC, and my long time personal favorite....the trusty CRC t-fource. With any and all of those cars I have been able to achieve remarkably similar lap times. For me the choice has always been a matter of which car was easiest to setup and to be consistantly fast with time after time. Also important is the production quality of the parts, and readily available affordable parts supply and manufacturer support. Until now I've always reverted to the trusty CRC t-fource since it's always been so consistantly fast. It certainly hasn't hurt that CRC does such a great job of supporting their products. After trying so many experiments for such a long time, always looking to find a car that might be able to elbow my old favorite aside.....I think perhaps that has finally happened. The new CRC genX car has proven so far to be every bit as fast as any of the others and remarkably consistant from run to run (which until this car was always something I found to be problematic with any of the side spring designs). CRC seems to really have found a sweet spot with their latest offering. The quality is first rate, and there are no upgrades needed at all. The genX has proven to be an extremely satisfying piece. Smooth. Fast. Durable. Consistant. Agressive. Responsive. And....did I mention fast? But as stated, they all can be fast on occasion. For me it just seems to be a matter of personal preference (as borne out by the mixed results at major races). I can say that the genX ride get's my hearty "two thumbs up" recommendation. This thing is the bomb!! There's now all manner of experiments and also two trusty tfource cars hanging on the wall of the workshop. The genX has elbowed my old favorite aside and it has stolen my affections.
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Old 04-11-2007, 08:58 PM   #24838
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Quote:
Originally Posted by theisgroup
yeah, but look how much an m5 wight and then look at the new m3. carbon fiber roof and alum hood. also the lightest v8 on the market. I had an 07 m5 just too big for a track car. turned it back in
why would you take that to the track
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Old 04-11-2007, 09:12 PM   #24839
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Quote:
Originally Posted by Marcos.J
why would you take that to the track
whole reason I got into rc. i was wainting for my m3 and needed something to do. I love the track, so basically rc was the only outlet until my track car came in. I sold it 3 years later and "borrowed" a m5 for a week from the owner of the dealership. it was fun on the track, but just way too big. so I have a new m3 on the list. I can't wait, so i can get back to the track. it is the whole reason to have a car like that. i heard that steve dinnan has a turbo planned for the car to put it in the 500hp range.

also remember that the current m5 is one of the fastest sedans to run the ring. they call it the ring taxi
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Old 04-11-2007, 10:20 PM   #24840
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Quote:
Originally Posted by Marcos.J
wally
yes now thats better
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